Ingmar Guandique

Lawyers for a man convicted of killing Washington intern Chandra Levy returned to court Wednesday as part of their pitch to a judge that he deserves a new trial because of what they say are problems with a key witness.

A judge promised more openness Tuesday after months of confidential post-trial proceedings in the case of murdered Washington intern Chandra Levy, disclosing for the first time why a key prosecution witness could be discredited.